Furnace and air-injecting nozzle therefor.



I witweoaeox J. H. PARSONS.

FURNAUEAND AIR INJEGTING NOZZLE THEREFOR.

APPLICATION FILED JUNE-1, 1908. RENEWED AUG. 16, 1913.

1,092,853. Patented Apr. 14, 1914.

2 SHEETSSHEBT l.

J. H. PARSONS.

FURNACE AND AIR INJEGTING NOZZLE THEREFOR. APPLICATION FIL JUNE 1, 190a. RENEWED AUG.16, 1913.

1,092,853; Patented Apr. 14, 1914.

2 SHEETS-SHEET 2.

@TATE@ PATENT OFFIDE.

JOHN H. FARSONS, OF RIDLEY PARK, PENNSYLVANIA, ASSIGNOR TO PARSONS ENGINEERING COMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE.

FURNACE AND AIR-INJEGTING NOZZ LE THEREFOR.

Application filed June 1, 1908, Serial No. 435,991. Renewed August 16, 19-13.

To all whom it may concern Be it known that I, JOHN H. PARsoNs, a citizen of the United States, and residlng at Ridley Park, in the county of Delaware and;

State of Pennsylvania, have invented certain new and useful Improvements in Furnaces and Air-Injecting Nozzles Therefor, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in furnaces and air injecting nozzles therefor and has for its primary object the provision of instrumentalities designed to protect the exposed portions'of nozzles or pipes passing within the fire chamber and exposed to direct contact with the fuel or flame therein.

More specifically the invention relates to that general type of nozzle disclosed in my co-pending application filed March 11, 1908, Serial No. 420,557, in which I claimed broadly a nozzle provided with a protective facing detachably secured in position through the medium of cooperating parts or devices on the nozzle and facing.

Novel characteristics of the present improvements include the provision of the nozzle possessing means designed to cooperate with complementary means on a protective facing whereby to secure the facing to the nozzle not only at its opposite edges but also at an intermediate point whereby the facing is more securely retained in position and prevented from falling or otherwise escaping from the nozzle when cracked or broken, a tendency to do which exists in the attachment where no intermediate securing means is afi'orded and the facing cracks in the middle, more especially where there is no interfitting between the abutting edges of the sections which constitute the facing.

The securing means in the present instance,

' Specification of Letters Patent.

Patented Apr. 14?, 1914.

Serial No. 785,128.

Another novel feature of the invention is that by the special configuration of the nozzle to accommodate the peculiar formation of the protective facing, the front wall of the nozzle 1s formed with raised and depressed portions affording a larger surface area for the transmission of heat to the air on the interior of the nozzle as compared to a nozzle having a continuous fiat front wall.

In the drawings, Figure 1 is a vertical sectional view through one end of the furnace showing the attachment applied thereto, Fig. 2 is a bottom view of the same, Fig. 3 is a longitudinal sectional view through the nozzle, and Fig. 4 is a transverse cross sectional view on the line a0a2 of Fig. 3.

Referring more specifically to the drawings wherein like reference characters designate corresponding parts in the several views, A represents the fire chamber of an ordinary locomotive, B the grate thereof, and C the door opening. At the opposite corners of the fire chamber, of which it is simply necessary to refer to and illustrate but one, inasmuch as they are alike, I mount a supporting plate D, secured along its edges as at E to the bottom of the boiler beneath the usual mud ring thereof, having a flanged aperture F. To the flange or collar surrounding theaperture just referred to, I se cure an elbow pipe G extending laterally to the side of the locomotive to receive air forced thereinto by the travel of the same.

I represents the body or the heater portion of the nozzle, the same having a flat bottom J designed to rest upon the bed plate D and having a depending hollow stem K closely fitting the collar which surrounds the aperture F and opening into the interior of the pipe G. The exterior transverse contour of the nozzle is best seen in Fig. 4 of the drawings, from an inspection of which it will be observed that the back of, the nozzle is of angular formation, as at L, to fit the corner of the fire box and be protected, by its abutment with the walls of the fire box, from direct exposure to the flames and gases in the fire chamber. The tip of the intermediate or heater portion of the nozzle, which is shown at R, is tapered to receive a correspondingly tapered portion of a detachable mouth or discharge end S of the nozzle, this mouth being flattened whereby to emit the heated air in a film or sheet formation, the top and bottom walls thereof being reinforced against buckling or collapsing under the heat by a vertical partition T. To enable the injection of steam into the nozzle whereby to force'air thereinto and therethrough I provide a jet nozzle Y discharging upwardly through the elbow pipe G toward the discharge end of the nozzle and approximately centrally thereof. This jet nozzle maybe attached to any convenient source of supply as is obvious.

From the description of so much of the device, as has been above set forth, it will be appreciated that the heater portion of the nozzle may be inserted or withdrawn by simply placing the same upon or lifting it from the bed plate D; also that the discharge end S may be removed at will, or adjusted laterally by shifting the same and under slight pressure creating a binding or wedging contact between the same and the tapered end of the heater portion of the nozzle.

The improved means of protecting the front or exposed surface of the nozzle will be now considered. The opposite sides of the heater portion I are depressed to form vertical grooves or ways 2 while the front of the same is provided with an intermediate groove 3 of approximately T or dove-tail formation. Adapted to be successively slipped downwardly into the grooves or ways 2 and 3 and to be supported upon the bed plate D, are a series of fire brick or equivalent sections 4, provided with oppositely disposed inwardly projected flanges 5 at their edges formed complementary to interlock with the grooved portions 2 of the heater portion; and further provided with an intermediate rib 7 formed to correspond with and snugly engage the groove or way 3 of the nozzle. The upper and lower edges of these fire brick sections are provided with a tongue 6 and groove 8 respectively whereby to rest firmly upon and to interlock with each other to present a continuous protecting front. By this arrangement, the sections of fire brick are not only held in position by the bed plate D and grooved portions 2 of the heater 1, but they are also efiectively held at a third or intermediate point 3-7, and interlocked at their edges against any rattling or play which would tend to fracture or wear the edges or corners of the sections.

By securing the fire brick sections at the three points, it will be seen that it is practically impossible for the sections to become fractured or burnt under ordinary service in such a way that they can fall from the nozzle, in fact the fracture would have to be of a most unusual character to enable this to be done. Consequently the wall of the nozzle will remain protected for a long period of time and even though one or more of the sections become broken or cracked, it will remain in place until supplanted by another in the course of the usual inspection and repair work.

The front wall of the nozzle, owing to the depressed or grooved portions 2 and 3 presents in general respects a corrugated formation whereby such front wall is of an extensive surface area enabling greater transmission of heat therethrough to the air on the interior of the nozzle'than is the case where the front wall of the nozzle is flat.

I claim:

1. In combination with a nozzle of the character described, having grooved portions, a protecting facing for the front portion of the nozzle consisting of a plurality of adjoining sections flanged to engage said grooved portions at the opposite edges of the facing and at a point intermediate said edges to slidably interlock the sections with the nozzle.

2. The combination with a nozzle of the character described having grooved portions,of a protecting facing for the front thereof flanged to engage said groovedpon tions at the opposite edges of the facing and at a point intermediate said edges whereby the facing is detachably secured in position.

3. In combination with a nozzle of the character described having three grooves, one of which is approximately T-shaped in cross section, a protecting facing therefor consisting of a plurality of adjoining sections having three flanges formed complementary to the grooved portions of the nozzle slidably engaging the same.

4-. The combination with the fire box of a furnace, of means for discharging air thereinto above the fuel comprising a combined heater and nozzle consisting of an elongated vertically disposed heater adapted to be inserted in the fire box in position to be embedded in the fuel, a supply pipe for the heater, the heater being of a substantially enlarged area relative to the pipe to permit expansion of the air therein, a nozzle offset from the latter in an approximately horizontal direction, the mouth of the nozzle being flat to emit the air in sheet formation, the side walls of the heater being deflected inwardly to constitute vertical grooves, and a sectional detachable facing having inwardly turned portions entering the grooves to secure the same in place.

5. The combination with the fire box of a furnace, of means for discharging air thereinto above the fuel comprising a combined heater and nozzle consisting of an elongated vertically disposed heated adapted to be inserted in the fire box in position to be embedded in the fuel, a supply pipe for the heater, the heater being of a substantially enlarged area relative to the pipe to permit expansion of the air therein, a nozzle offset from the heater in an approximately horizontal direction, the mouth of the nozzle being flat to emit the air in sheet formation, a protecting facing for the heater comprising a plurality of superposed sections having portions interfitting with the heater to removably secure the facing in place, the upper end of the heater adjoining the nozzle being contracted relative to the body of the heater and the upper section of the protecting facing being contoured to overlie and protect said contracted portion, the contracted portion of the heater detachably interfitting with the nozzle.

6. The combination with the fire box of a furnace, of means for discharging air thereinto above the fuel comprising a combined heater and nozzle consisting of an elongated vertically disposed heater adapted to be inserted in the fire box in position to be embedded in the fuel, a supply pipe for the heater, the heater being of a substantially enlarged area to permit expansion of the air therein, a nozzle offset from the heater in an approximately horizontal direction to emit the air over the bed of fuel, the forward wall of the heater near its top being of sinuous formation merging into a contracted throat portion feeding to the nozzle, and a protecting facing for the forward wall of the heater having edge portions interfitting with the side edge portions of the heater to removably secure the protecting facing in place, the upper portion of the protecting face being of sinuous formation corresponding to the shape of the upper portion of the heater to protect the heater at that portion thereof immediately adjoining the nozzle.

7. The combination with the fire box of a furnace, of means for discharging air thereinto above the fuel comprising a combined heater and nozzle consisting of an elongated vertically disposed heater adapted to be inserted in the fire box in position to be embedded in the fuel, a supply pipe for the heater, the heater being of a substantially enlarged area to permit expansion of the air therein, a nozzle offset from the heater in an approximately horizontal direction to emit the air over the bed of fuel, the forward wall of the heater near its top being of sinuous formation merging into a contracted throat portion feeding to the nozzle, and a protecting facing for the forward wall of the heater having edge portions interfitting with the side edge portions of the heater to removably secure the protecting facing in place, the upper portion of the protecting face being of sinuous formation corresponding to the shape of the upper portion of the heater to protect the heater at that portion thereof immediately adjoining the nozzle, the nozzle having a hollow stem portion fitting the contracted throat of the heater and terminating at a point adj acent to the upper edge of the protecting facing so that the throat above the protecting facing is protected by a double thickness of metal.

8. In combination with a nozzle of the character described having grooved portions, a protecting facing for the front por tion thereof consisting of a plurality of adjoining sections fianged to engage said grooved portions at the opposite edges of the facing and at a point intermediate said edges to interlock the sections with the nozzle, the adjoining sections of the facing having overlapping portions, substantially as described.

9. The combination with the fire box of a furnace, of means for discharging air thereinto above the fuel comprising a combined heater and nozzle consisting of an elongated vertically disposed heater adapted to be inserted in the fire box in position to be embedded in the fuel, a supply pipe for the heater, the heater being of a substantially enlarged area relative to the pipe to permit expansion of the air therein, a nozzle offset from the heater in an approximately horizontal direction, the mouth of the nozzle being fiat to emit the air in sheet formation, a protecting facing for the heater comprising a' plurality of superposed sections having portions interfitting with the heater to re movably secure the facing in place, the upper end of the heater adjoining the nozzle being contracted relative to the body of the heater and having an upwardly and inwardly receding front and the upper section of the protecting facing being contoured to overlie and protect said receding front portion, the contracted portion of the heater detachably interfitting with the nozzle.

10. The combination with the fire box of a furnace, of means for discharging air thereinto above the fuel comprising a combined heater and nozzle consisting of an elongated vertically disposed heater adapted to be inserted in the fire box in position to be embedded in the fuel, a supply pipe for the heater, the heater being of a substantially enlarged area to permit expansion of the air therein, a nozzle ofiset from the heater in an approximately horizontal direction to emit the air over the bed of fuel, the forward wall of the heater near its top being of lon gitudinally sinuous formation merging into a contracted throat portion feeding to the nozzle, and a protecting facing for the forward wall of the heater having edge portions interfitting with the side edge portions of the heater to removably secure the protecting facing in place, the upper portion of the protecting face being of sinuous formation corresponding to the shape of the upper portion of the heater to protect the heater at that portion thereof immediately adjoining the nozzle.

11. The combination with the fire box of a furnace, of means for discharging air thereinto above the fuel comprising a combined heater and nozzle consisting of an elongated vertically disposed heater adapted to be inserted in the fire box in position to be embedded in the fuel, a supply pipe for the heater, the heater being of a substantially enlarged area to permit expansion of the air therein, a nozzle offset from the heater in an approximately horizontal direction to emit the air over the bed of fuel, the forward wall of the heater near its top being of longitudinally sinuous formation merging into a contracted throat portion feeding to the nozzle, and a protecting facing for the forward wall of the heater having edge portions interfitting with the side edge portions of the heater to removably secure the protecting facing in place, the upper portion of the protecting face being of sinuous formation corresponding to the shape of the upper portion of the heater to protect the heater at that portion thereof immediately adjoining the nozzle, the nozzle having a hollow stem portion fitting the contracted throat of the heater and terminating at a point adjacent to the upper edge of the protecting facing so that the throat above the protecting facing is protected by a double thickness of metal. 7

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN H. PARSONS. Witnesses:

GEO. W. MCCAULLEY, 2d, JOHN F. LYNN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

